The potential risks of climate change

THE climate change risks are a growing threat to populations and the environment. As ocean levels rise, the frequency and intensity of floods increase, while fires, droughts and storms become more severe. Let's study this complex phenomenon more closely in order to understand what risks it presents for our current society!

Definition of climate risks

THE climate risks refer to all the direct and indirect consequences of climate change on the population, the environment and the standard of living. The resulting risks are likely to increase extreme weather conditions, while modifying the thermal, calcareous and hydrological structure of natural systems.

Definition of natural hazards

Natural hazards can be defined as any form of danger or harm caused by physical, chemical and biological forces intrinsically linked to the earth. The phenomena that generate these dangers can be classified into four categories:

• hydrometeorological (floods, storms and frost)
• geophysical (avalanches, landslides, landslides)
• volcanic (incandescent lava, explosions)
• biological (diseases)

Definition of climate risks

Climate risks are the direct or indirect consequences of climate change and can have a significant impact on the population, the environment and/or the standard of living.

They include in particular:

1. the intensification of certain extreme weather conditions such as flooding,
2. heatwaves,
3. fires or droughts;
4. modification of watercourses;
5. the retreat of glaciers and their impact on hydrology;
6. the drop in the level of groundwater;
7. the widespread movement of animal and plant species;
8. an increase in diseases transmitted by pests.

Causes of climate risks

The causes that contribute to climate change are varied: there is a significant part due to human activities such as industrial and automobile emissions into the atmosphere; as well as a natural influence such as occasional variations in solar activity. The largest driver is probably the anthropogenic radiative forcing associated with massive releases of greenhouse gases mainly from the industrial sector.

Natural causes

There are various factors that can affect the global climate; not all of them are linked to human activity. The sun is the primary factor controlling the radiant flux entering the Earth's atmosphere, followed closely by volcanic eruptions and solar variability. Short-term adjustments in climate may also be due to variations in Earth's orbit and tilt.

Anthropogenic causes

The most important human causes are directly linked to anthropogenic radiative forcing (ARF), which is mainly caused by massive releases of greenhouse gases from industries and cars. The main contributors to FRA are carbon dioxide (CO2), methane (CH4) and chlorofluorocarbons (CFCs). Deforestation, intensive agricultural land use, albedo and land use change also contribute.

Consequences of climate risks

Climate change will have a considerable impact on different sectors of society including health, agriculture, fisheries, industry, transport, urban infrastructure and much more. However, some consequences are of particular concern.

Impacts on the population

According to a study carried out by the French National Center for Meteorological Studies (Météo-France), one in 4 French people is potentially exposed to flooding, which thus represents the main major national risk in terms of the number of municipalities affected and the estimated cost of disasters. In addition, climate change exerts its influence on temperatures and precipitation, the fluctuations of which vary from one year to the next, causing: floods, fires, intense heat and droughts.

• Floods: increased flash floods associated with stormy rains or landslides.
• Fires: more seasonal fires caused by prolonged periods without precipitation.
• Heatwaves: significant increase in extreme temperatures due to the overall rise in the thermometer.
• Droughts: notable reduction in winter precipitation leading to a drop in the level of watercourses.

Environmental impacts

Climate change will also seriously affect the environment, particularly terrestrial and marine ecosystems. The direct and indirect consequences are numerous; some of the most important are: the melting of glaciers which modifies the hydrological regime of large rivers; falling ocean levels leading to increased coastal erosion; the disruption of food chains (particularly endangering endemic species); early flowering and widespread movement of plants and animals.

Impact on standard of living

According to certain studies, the estimated cost of climate disasters by 2050 is expected to multiply by 20. This will have a substantial impact on the global economy, particularly in terms of covering the material, human and natural damage caused by this phenomenon. . Poverty will be amplified by loss of livelihoods, with a potential combination of destruction from floods, landslides, fires and other associated risks. In any case, there is a high probability that climate change will significantly increase the level of social and economic vulnerability. In conclusion, Climate change is having a growing negative impact on the environment and populations across the world. This global threat must be addressed collectively in order to minimize its harmful effects on the future of future generations. Read also: The benefits of renewable green energy